Danone said that the price rise had already been decided earlier this year

In one of the examples found by the Sun Online, the cost of a 900g box of Aptamil First Instant Milk Powder has gone up from an average price of £10 in early October to £11, according to data from MySupermarket.com.

Other items in its baby milk range have also gone up by 10 per cent, including the Aptamil Follow on Milk Power (900g).

While a 1 litre bottle of Aptamil First Infant Milk Ready Made has gone up from £3.50 to £3.70 – a rise of 5.7 per cent.